EFFICIENT ACK/NACK TRANSMISSION

摘要

Methods, systems, and devices are described for wireless communication. Wireless devices may exchange data using Medium Access Control (MAC) layer units known as transport blocks which may include a number of code blocks (CBs). A receiving device may attempt to decode each CB and send acknowledgement (ACK) and negative-acknowledgment (NACK) feedback to the transmitting device based on the whether each CB was successfully decoded. The receiving device may determine a format from two or more available formats for transmitting the ACK/NACK feedback. The format for the ACK/NACK feedback may be determined based at least in part on a number of CBs received and a number of CBs that have a NACK feedback. ACK/NACK feedback may be provided on an individual CB basis, or for bundles of CBs. The transmitting device may perform blind decoding of the received feedback to determine the ACK/NACK format and CBs that have NACK feedback.

主权项

1. A method of communication at a wireless device, comprising:
receiving a plurality of code blocks (CBs) in a received transmission; determining hybrid automatic repeat request (HARQ) acknowledgment/negative acknowledgment (ACK/NACK) feedback for each CB of the plurality of CBs; identifying a format, from two or more available formats, for transmitting the HARQ ACK/NACK feedback; and transmitting the HARQ ACK/NACK feedback using the identified format.